Slightly ruthenium doping enables better alloy nanoparticle exsolution of perovskite anode for high-performance direct-ammonia solid oxide fuel cells

Roadmap on exsolution for energy applications

“…In addition, ruthenium not only provides excellent catalytic activity for the anode, but trace amounts of ruthenium doping can also promote the exsolution of metals in the perovskite in the form of alloys, which can greatly enhance the catalytic activity of DA-SOFC anode. ) with smaller particles (50 vs. 20 nm), which led to a significant increase in the catalytic activity of r-PSCFRu for the NH 3 decomposition reaction [116]. The experimental results also show that the DA-SOFC with r-PSCFRu anode has a PPD of 374 mW cm −2 at 800 • C, which is nearly 30% higher than that of the cell with r-PSCF anode, and the operational durability is also improved.…”

High-performance Ruddlesden–Popper perovskite oxide with in situ exsolved nanoparticles for direct CO2 electrolysis

“…50,60,62 It has also been reported that Pr 2 O 3 promotes the charge transfer process and can reduce the interfacial resistance of a fuel electrode. [47][48][49] Moreover, RP structured oxides facilitate oxygen ion migration due to the interstitial oxygen species in the lattice. 29 This phase transformation was clearly dependent on the temperature (Fig.…”

Challenges and advancement in direct ammonia solid oxide fuel cells: a review

“…In another recent study, Ru-doped Pr 0.6 Sr 0.4 Co 0.2 Fe 0.75 Ru 0.05 O 3− δ single-phase perovskite gave a maximum power density of 500 mW cm −2 with 100% NH 3 conversion at 800 °C. 86 In a reducing atmosphere, Pr 0.6 Sr 0.4 Co 0.2 Fe 0.75 Ru 0.05 O 3− δ decomposed to Pr 2 O 3 nanoparticles and Pr 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ , accompanied by the exsolution of CoFeRu-based alloy nanoparticles that improved the catalytic activity, anti-sintering capability, and stability of the anode. Zhong et al 87 studied pyrochlore Pr 2 B 2 O 7 oxides ( B = Zr, ZrSn, Sn) and perovskites ( B = Ti) as cathodes with 8YSZ electrolyte.…”